直接的および急性オゾン化中のスルファメトキサゾールの酸化変換:経路,運動学,および水質への影響

Unai Duoandicoechea¹, Jorge Sáiz², Senentxu Lanceros-Méndez³

¹Department of Environmental and Chemical Engineering, Faculty of Engineering Vitoria-Gasteiz, University of the Basque Country UPV/EHU, Vitoria- Gasteiz, 01006, Spain.

Journal of environmental management

|February 13, 2026

まとめ

オゾンは,水中の抗生物質スルファメトキサゾール (SMX) を効率的に分解します. 酸性条件は,アルカリ性条件と比較して,SMXの除去速度と高度の鉱化を促進します.

科学分野:

環境化学環境化学
水処理技術について

背景:

スルファメトキサゾール (Sulfamethoxazole,SMX) は,水中の環境における持続的な抗生物質汚染物質である.
高度酸化プロセス (AOP) は,SMXの除去に不可欠ですが,その分解経路は複雑です.
オゾン化に対するpHの影響を理解することは,SMX除去を最適化するための鍵です.

研究の目的:

異なるpH条件下 (酸性対アルカリ性) でオゾン化を使用してスルファメトキサゾール (SMX) の分解を調査する.
分子オゾンとヒドロキシルラジカル体制がSMX変換と鉱化に与える影響を明らかにする.
水質パラメータの改善における酸性およびアルカリ性オゾン化の効率を比較する.

主な方法:

pH 3.0 (分子オゾン支配) と pH 13.0 (ヒドロキシル基支配) でSMXのオゾン化.
SMXの分解と中間物質の形成の運動分析.
鉱化評価のための全有機炭素 (TOC) 除去の測定.
水質のパラメータのモニタリングは,色と芳香度を含む.

主要な成果:

SMXの分解は擬似第一次動力学に従っており,酸性pHでは高速度定数 (0.3541分−1) が存在し,アルカリ性pH (0.2231分−1) に比べて高速度定数 (0.3541分−1) が存在している.
酸性オゾン化は,SMXの急速な除去とより高い鉱化 (36.9%のTOC減少) をもたらしたが,アルカリ性オゾン化は,軽微なTOC減少 (2.1%) を示した.
明確な中間プロファイルと副産物のより長い持続性は,アルカリ条件下で観察されました.

結論:

酸化体制 (分子オゾン対ヒドロキシルラジカル) は,SMXの分解経路と効率を大きく左右する.
酸性オゾン化は,SMXの除去と鉱化を含む水質の改善により効果的です.
pHの最適化は,SMXで汚染された水を処理するオゾン化のパフォーマンスを高めるために重要です.

キーワード:

劣化経路は劣化経路である.キネティクス (運動力学) とはオゾンによる酸化による酸化.サルファメトキサゾール (sulfamethoxazole) とは水質のパラメータ pHの影響は,pH値に影響する.

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